Resistance device.



PATENTED SEPT. 5, 1905.

G. BAEHR.

RESISTANCE DEVICE.

APPLICATION FILED SEPT. 28. 1904.

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UNITED STATES PATENT oFFIoE.

RESISTANCE DEVICE.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed September 28, 1904;. Serial No. 226,371.

To whom; it may concern:

Be it known that I, GEORGE BAEHR, a resident of McKeesport, in thecounty of Allegheny and'State of Pennsylvania, have invented a new anduseful Improvement in Resistance Devices; and I do hereby declare thefollowing to be a full, clear, and exact description thereof.

My invention relates to electric resistance devices; and its object isto provide a device of this character in which the units are so formedand assembled that one or more can be taken out and replaced in case ofbreakage or injury without disturbing the others and which device as awhole is so constructed that it can be readily secured in place.

In the accompanying drawings, Figure 1 is a side view of acontroller-stand with my improved resistance device applied thereto.Fig. 2 is a rear view of the same. Fig. 3 is a vertical section, on anenlarged scale, through the resistance device; and Fig. 4. is a detailview of one of the units.

My resistance device comprises a frame 1, formed by two side members 2,made, preferably, of, cast metal, together with suitable crossconnecting bolts or rods, four such bolts or rods being shown and beingnumbered 3, 4, 5, and 6, respectively. The number of these bolts orrods, however, will vary with the number of sets of units in theresistance device. The resistance-conductors are formed of a number ofunits or elements 8, each comprising a conductor bent upon itself anumber of times to form a number of loops 9, practically parallel witheach other, these conductors terminating in enlarged ends 10, which areformed as hooks 11 or holes open on one side. These hooked ends takeover the cross rods or bolts 'of the suspendingframe, and as they openon their sides the units can be taken out or put in place by merelydrawing the same out sidewise. These resistance devices are insulatedfrom the cross bolts or rods by suitable sleeves 12 and from each otherbydisks 13, of mica or other suitable insulating material. Three seriesor sets of such units are employed in the device shown, one set alocated at the upper end of the suspending-frame and hooking onto thecross-bolts 3 and 4, the second set I) located at the middle of thesuspendingframe and hooking onto the cross rods or bolts 1 and 5, andthe lower set a hooking onto the bolts 5 and 6. The number of sets,however, is not material and may vary according to the length of thesuspendingframe. In case more than three sets are used all of theintermediate sets will correspond in shape and arrangement with themiddle set shown in the drawing.

At the upperends of the upper sets the enlarged heads 10 are providedwith suitable means for securing the conductors thereto, such as holesand intersecting binding-posts 14. The units of the .middle set are allinsulated the one from the other, while the units of the upper and lowersets are insulated in pairs, the connections being such that the current will pass from a unit in the upper set through a unit in the middleset into a unit of the lower set, from this to another unit of the lowerset, thence up through a unit in the middle set to a unit in the upperset, which latter unit is insulated from the unit in the upper set, fromwhich the current started, but is arranged in a pair with another unit,so that the current will pass to the latter and thence again downthrough the middle and lower sets and up through other units, thuspassing up and down through the various units until it reaches theoutgoing bindingpost. The resistance is due to the length of conductorformed by the several units when united in the manner described.

Should any one or more of the units become broken, it is only necessaryto loosen up the nuts on the ends of the cross bolts or rods 3, A, 5,and 6, when the disabled unit can be drawn out sidewise and another oneput in its place withouttaking the entire frame apart and withoutdisturbing the other units in said frame.

Another feature of the invention consists in the manner of suspendingthe frame 1. In the drawings it is shown connected to an ordinarycontroller-frame 15. This frame is provided with a pair of cross bars orcleats 16 and 17, the upper one preferably being provided with a beveledupper edge. The side frames 2 are provided near their upper ends withhooks 18, which take over the cross-bar 16, and at their lower ends withshoulders 19, which will bear against the lower edge of the cross-bar17. The cross-bars 16 and 1'7 extend entirely across thecontroller-frame, and the manner of suspending the resistanceframe issuch that the latter may be very much narrower than the former. As amatter of fact any size of resistance device less than the full width ofthe controller-frame can be suspended on the cross-bars 16 and 17 withequal facility. The side frames 1 are provided with perforated ears orlugs 20, whereby the frame may be bolted to the eross-bars 16 and 17 Thecontroller-frame 15 is open on the side, so that the resistance devicecan be easily pulled out sidewise when necessary. This is advantageousin confined spaces, when there is little room to work in.

Resistance devices of the general character shown herein are not new,the novelty in this case being entirely in the manner of uniting theunits to the cross bars or rods in the suspending-frame, so as tofacilitate the removal and replacement of said units, and also in themanner of suspending the resistance device in the controller-frame sothat it can be easily removed and replaced and so that any size ofresistance device can with equal facility be placed in thecontroller-frame.

What I claim is 1. In a resistance device, the combination of a frame,three or more rods supported thereby, two or more series of units, eachprovided with hooked ends opening in the same direction for engagingsaid rods, and insulation between said units and said rods, the units ofthe two series being arranged in pairs and insulated the one from theother, and the units of one pair of one series being electricallyconnected with units of different pairs of the other series.

2. In a resistance device, the combination of two side members,cross-rods connecting the same, two or more series of units, each unithaving hooked ends in diiferent planes transversely of the unit andopening sidewise whereby they can be engaged with and disengaged fromthe cross-rods without disturbing the other units, and insulationbetween said units and said rods, the units of the two series beingarranged in pairs and insulated the one from the other, and the units ofone pair of one series being electrically connected with units ofdifferent pairs of the other series.

3. In a resistance device, the combination of a frame, rods supportedthereby, three or more series of units, each provided with hooked endsin different planes transversely of the unit and opening sidewise andengaging said rods, and insulation between said units and said rods, theunits of the two end series being arranged in pairs and insulated theone from the other, and the intermediate series being arranged singlyand insulated one from the other and electrically connecting a unit ofone pair of one end series with a unit of another pair of the other endseries.

4:. In a resistance device, the combination of two side members, crossrods or bolts connecting the same, three or more series or sets ofunits, each provided with hooked ends opening in the same direction forengaging the cross rods or bolts, and insulation between said units andsaid cross rods or bolts, the units of the two end series being arrangedin pairs and insulated the one pair from the other, and the intermediateseries being arranged singly and insulated one from the other andserving to electrically connect a unit of one pair of one end serieswith a unit of another pair of the other end series.

5. The combination with a supportingframe, of a plurality of resistanceunits, and

a suspending-frame in which said units are,

mounted, said frame being provided with projections for engaging thesupporting-frame.

6. The combination with a supportingframe, of a suspending-framecomprising two side members, resistance units secured therebetween, andprojections on the edges of said side members for engaging thesupportingframe.

7 The combination with a supportingframe provided with a pair ofcross-bars, of a suspending-frame comprising side members having bookson their edges for engaging the cross-bars of the supporting-frame, andresistance units secured between said side members.

8. A resistance device comprising apair of side members,suspending-hooks formed on the edges thereof, and a series of resistanceunits secured between said side members.

In testimony whereof I, the said GEORGE BAEHR, have hereunto set myhand.

GEORGE BAEHR.

Witnesses:

ROBERT C. TOTTEN, G. KREMER.

